Which of the following statements best explains why a closedballoon filled with helium gas rises in air?(a) Helium is a monatomic gas, whereas nearly all the moleculesthat make up air, such as nitrogen and oxygen, arediatomic.(b) The average speed of helium atoms is greater than theaverage speed of air molecules, and the greater speedof collisions with the balloon walls propels the balloonupward.(c) Because the helium atoms are of lower mass than the averageair molecule, the helium gas is less dense than air.The mass of the balloon is thus less than the mass of theair displaced by its volume.(d) Because helium has a lower molar mass than the averageair molecule, the helium atoms are in faster motion. Thismeans that the temperature of the helium is greater thanthe air temperature. Hot gases tend to rise.

Q: A helium-filled weather balloon has a volume of 684 L at 23.9°C and 757 mmHg. It is released and…

A: For the phase change of the ideal gas the temperature, pressure, and volume of the initial state and…

Q: A sample of nitrogen gas (N2) is at a temperature of 25oC. Calculate the speed of the N2 molecule…

A: Since the kinetic energy of 1 mole of the gas molecules is given by  KE = (3/2) RT  where R = gas…

Q: If you double the volume of a constant amount of gas at a constant temperature, what happens to the…

A: a) The pressure doubles.(b) The pressure quadruples.(c) The pressure does not change.(d) The…

Q: Consider separate 1.0 liter gaseous samples of N2, Ar, CH4, and CO2 all at STP... (a) Rank the…

A: The gaseous samples given at STP are N2, Ar, CH4, and CO2.

Q: The total pressure exerted by oxygen gas saturated with water vapor is 764 torr at a temperature at…

A: The given total pressure (P) = 764 torr   Partial pressure is the pressure or vapor pressure exerted…

Q: ) (a) What is the volume of one mole of hydrogen gas at 273 K and 760 torr? (b) What is the volume…

A: Temperature = T = 273 KPressure = 760 torrNo of moles of gas (Nitrogen) = 1Volume = to be determined…

Q: Q4.2 A container, of volume 0.85 m³, has 500 g of an ideal gas at a temperature of 30°C and a…

A: The solution involves a series of mathematical calculations and conversions, and careful attention…

Q: What volume does 0.118 mol of helium gas at a pressure of0.97 atm and a temperature of 305 K occupy?…

A: For He gas : Ideal gas equation : PV = nRT 0.97 x V = 0.118 x 0.0821 x 305  V = 3.046 L For Ar gas :…

Q: What pressure of Neon gas would you expect to find inside a sealed glass container with a 1.66 L…

A: Given values are, Volume V= 1.66 L Moles n= 0.891 mol  Temperature T= 313 K Pressure =?  Gas…

Q: When 15.0 g of fluorite (CaF₂) reacts with excess sulfuricacid, hydrogen fluoride gas is collected…

A: The number of moles of HF which is produced when CaF2 reacts with excess sulfuric acid is calculated…

Q: ) A piston at 4595 torr contains a gas that occupies a volume of 4.7 L. What pressure would have to…

A: Given- P1=4595torr  V1=4.7L  V2=0.77L  P2=?

Q: When strongly heated, CaCO3 decomposes into carbon dioxide gas and calcium oxide. What mass of…

A:

Q: When gasses are collected by water displacement, there is always water vapor (gaseous water)…

A: Answer:Dalton's law states that total pressure of the system is always equal to the sum of the…

Q: In a collision of sufficient force, automobile air bags respondby electrically triggering the…

A: The ideal gas law, also referred to as the general gas equation, is the equation of the state of the…

Q: When gasses are collected by water displacement, there is always water vapor (gaseous water)…

A: Answer:Dalton's law states that total pressure of the system is always equal to the sum of the…

Q: A helium-filled weather balloon has a volume of 512 L at 16.9°C and 758 mmHg. It is released and…

A:

Q: Gas Y effuses half as fast as O2. What is the molar mass of gas Y?

A: rate of effuses is inversely proportional to the square root of the molar mass of gas.

Q: (a) A piston at 2.6 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to…

A: Pressure(P) = 2.6 atm, 8545 torrInitial Volume(V1) = 3.5 L, 2.5 L, 4.7 LFinal volume(V2) = 1.07 L,…

Q: When 0.583 g of neon is added to an 800-cm3 bulb containing asample of argon, the total pressure of…

A: Interpretation-  To determine the mass of the argon in the bulb when  0.583 g of neon is added to an…

Q: A mixture of gases contains: 2.70 g He, 8.13x1022 atoms of Ne, and 0.180 mol Ar. If the total…

A:

Q: When gasses are collected by water displacement, there is always water vapor (gaseous water)…

A: Answer:Dalton's law states that total pressure of the system is always equal to the sum of the…

Q: what quantity of moles of chlorine gas at 120.0 C abs 33.3 atm would occupy a vessel of 40.5L?

A:

Kinetic-Theory of Gases

Kinetic theory of gases is the model or method which was developed in the 19th century by Maxwell and Boltzmann. This is possible as the interatomic force which is of short-range forces that are important for solids and liquids can be neglected for gases. This theory or gas law gives a molecular interpretation of the pressure and temperature of a gas and is consistent with gas laws and Avogadro’s hypothesis. This theory is very helpful to correctly explain the specific heat capacities of many gases, kinetic energy and it also explains the transport qualities such as viscosity, thermal conductivity, and diffusion with molecular parameters. As stated in the kinetic-molecular theory, the temperature of a substance or gas particle is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles, called average kinetic energy.